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148 Threads found on Air Box
Port error - There is no dielectric object touching the port. Like Nuphi mentioned extend the air box in neg Z direction
You did not assign Radiation boundary to the outer faces of the air box. After assigning Rad Boundary, you will notice few warnings that Radiation boundary is intersecting Finite Cond boundary. So, you need to re-prioritize the boundaries (See HFSS Help). Finally, you are plotting Mag E / Surface J for the dielectric object. Instead select the sig
Hello. I did the design of the antenna with CST, but when I compare with HFSS, I get a big difference of the reflection coefficient. What is the problem? Is it the airbox or the port or what?
Hello every one, I'm a student, i have designed a PIFA antenna with coaxial work correctly but the problem when i want to design the airbox for radiation pattern i have a bad result.i have tried to put the length of the box lambda/4 but i have the same problem. Please it's urgent any body can help me to configure my (...)
If you're looking for the phase response of a normally incident plane wave on a Sievenpiper surface, the height of the air box (wave port) doesn't really matter -- as long as it's larger than roughly one quarter wavelength. Be sure to de-embed the port!
Hi I also meet the same problem, suggest to download Ansoft Antenna Design Kit and read "help" document. Need to create a "virtual air box" for solve far field used, also can read HFSS workshop Chapter3 will be helpful. Enzo
Hi, first off all you need to understand the Radiation Boundary you use. The thing you want to simulate is the far field characteristics of your antenna in an infinitly large air box. As this cannot be designed you put the radiation boundary at the end of a finite airbox. This boundary is shall absorb all incoming waves but (...)
Hi, I want to make a glove box for soldering inside the house with closed windows and so avoiding the chemicals associated with soldering (solder fumes and lead/lead-free metals on hands). Initially, I thought of bringing air inside the box, using a tube, from outside and having a second tube to put air out of the (...)
Use relative co-ordinate system and adjust it in the center of main co-ordinate systems it will automatically keep your design in the center of air box.
If you have a material definition of your oil, I don't see why using the radiation boundary box as your "container" wouldn't work. I've only used air and vacuum, so I have never tried this.
A ducted air flow into a heat sink with narrow blades is what matters most, and pouring it toward out of the equipment ensures that the circulating air flow in the rest of the equipment will be coming in at room temperature. Finally, the geometry of the apparatus allows to compress the volume different from the old audio amplifiers with bulky exter
Hello everyone, I have a question, so I need your helps, please. I don't know that why we can use the two different dimension vacuum box in HFSS for the dipole antenna simulation at 900MHz? And we just add the radiation boundary for one or both box? Thank you very much!
Hi all, I'm having an issue simulating a circular microstrip patch antenna over an infinite ground plane using a PLM boundary to keep the simulation space size small. Here's what I am seeing: I have a box of air that defines my problem space with the bottom of the box co-planar with the bottom of my antenna's substrate material. I (...)
Hi, I am newbie to HFSS but i have quite some knowledge on EM and FEM modellings. I have a very simple box type geometry surrounded by an air box. I want to assign planar wave excitation on the top which is neat, and a floquet port on the bottom. This is not happening and always throws me an error "Floquet port excitation must touch the (...)
hi I am desining a antenna that consists of a circular ground plane, probe is located at the center and arond it there is 8 paralelpied elements constitute wave polarizer that convert linearly polarized wave generated by probe into circularly polarized wave. Here length of probe is 13.5mm, dimension of parallelpiped element is 62mm x 6 mm x10mm
When we simulate an antenna using HFSS, an air box with a distance of quarter wavelength from the radiator usually should be created. I am trying to simulate an antenna with frequency range of interest from 50 MHz to 500 MHz. Should I still use a quarter wavelength air box in the simulations. A quarter wavelength will be (...)
in the design, if air box be from -5 to 5, how much de-embed we need? and what happens for S11? its good or not? how it should be? and in the design you define variable of "a". for what?
Hi to everybody. I am a newbie in HFSS, i'm trying to simulate a microstrip filter and obtain the S parameters. I used until now the radiation boundary conditions, but for obtaining more accurate results, I'm trying to use PML. What should I do for the faces of the airbox where there are the two waveports? I cannot use PML on them, and there are
Hi everyone, I want to use HFSS to simulate the electromagnetic reflection coefficient of a multi-layer structure (namely electromagnetic absorber), the thickness of each layer of which is about 5 mm, made by dielectric material. The electromagnetic wave, the frequency of which is about 5 GHz, is normal to the planar interface. Our design object
Hi sorry,i didn't have CST simulation experience. In the HFSS, it is need to set the boundary condition of free space (air box) for simulation and according to the HFSS full book suggest as below The Radiation Boundary needs to be placed at least lumpda/4 from radiating devices. the bigger is better for air box, because it